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/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*-
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
// Constants
const Cc = Components.classes;
const Ci = Components.interfaces;
const Cu = Components.utils;
// Seconds between maintenance runs.
const MAINTENANCE_INTERVAL_SECONDS = 7 * 86400;
// Imports
Components.utils.import("resource://gre/modules/XPCOMUtils.jsm");
Components.utils.import("resource://gre/modules/Services.jsm");
Components.utils.import("resource://gre/modules/PlacesUtils.jsm");
XPCOMUtils.defineLazyModuleGetter(this, "PlacesDBUtils",
"resource://gre/modules/PlacesDBUtils.jsm");
/**
* This component can be used as a starter for modules that have to run when
* certain categories are invoked.
*/
function PlacesCategoriesStarter()
{
Services.obs.addObserver(this, PlacesUtils.TOPIC_SHUTDOWN, false);
// nsINavBookmarkObserver implementation.
let notify = () => {
if (!this._notifiedBookmarksSvcReady) {
// TODO (bug 1145424): for whatever reason, even if we remove this
// component from the category (and thus from the category cache we use
// to notify), we keep being notified.
this._notifiedBookmarksSvcReady = true;
// For perf reasons unregister from the category, since no further
// notifications are needed.
Cc["@mozilla.org/categorymanager;1"]
.getService(Ci.nsICategoryManager)
.deleteCategoryEntry("bookmark-observers", "PlacesCategoriesStarter", false);
// Directly notify PlacesUtils, to ensure it catches the notification.
PlacesUtils.observe(null, "bookmarks-service-ready", null);
}
};
[ "onItemAdded", "onItemRemoved", "onItemChanged", "onBeginUpdateBatch",
"onEndUpdateBatch", "onItemVisited", "onItemMoved"
].forEach(aMethod => this[aMethod] = notify);
}
PlacesCategoriesStarter.prototype = {
// nsIObserver
observe: function PCS_observe(aSubject, aTopic, aData)
{
switch (aTopic) {
case PlacesUtils.TOPIC_SHUTDOWN:
Services.obs.removeObserver(this, PlacesUtils.TOPIC_SHUTDOWN);
let globalObj =
Cu.getGlobalForObject(PlacesCategoriesStarter.prototype);
let descriptor =
Object.getOwnPropertyDescriptor(globalObj, "PlacesDBUtils");
if (descriptor.value !== undefined) {
PlacesDBUtils.shutdown();
}
break;
case "idle-daily":
// Once a week run places.sqlite maintenance tasks.
let lastMaintenance =
Services.prefs.getIntPref("places.database.lastMaintenance", 0);
let nowSeconds = parseInt(Date.now() / 1000);
if (lastMaintenance < nowSeconds - MAINTENANCE_INTERVAL_SECONDS) {
PlacesDBUtils.maintenanceOnIdle();
}
break;
default:
throw new Error("Trying to handle an unknown category.");
}
},
// nsISupports
classID: Components.ID("803938d5-e26d-4453-bf46-ad4b26e41114"),
_xpcom_factory: XPCOMUtils.generateSingletonFactory(PlacesCategoriesStarter),
QueryInterface: XPCOMUtils.generateQI([
Ci.nsIObserver
, Ci.nsINavBookmarkObserver
])
};
// Module Registration
var components = [PlacesCategoriesStarter];
this.NSGetFactory = XPCOMUtils.generateNSGetFactory(components);
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